GEOGRAPHIC AND SEGMENT INFORMATION - Geographic (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Sales	$ 6,954	$ 7,575	$ 16,247	$ 19,853
Domestic
Segment Reporting Information [Line Items]
Sales	5,214	5,552	12,225	14,002
International
Segment Reporting Information [Line Items]
Sales	$ 1,740	$ 2,023	$ 4,022	$ 5,851

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details